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After the relay is a time when added to (or remove) the operation of the input signal, the output circuit for an elapse of a predetermined time to produce accurate jump change (or contact action) A relay. It is a lower voltage used on smaller or current of the circuit, for turning on or off the high voltage, high current electrical components of the circuit. Meanwhile, time is also a relay using electromagnetic theory or mechanical principle to achieve the delay control control electrical appliances. Many of its kind, air damping type, electric and electronic type.

Main Feature

1, air damping, also known as balloon time relay time relay, which is based on the resistance generated by the compressed air to delay, its structure is simple, cheap, delay range (0.4 ~ 180s), but the precise delay low.

2, electromagnetic relay delay time is short (0.3 ~ 1.6s), but its structure is relatively simple, commonly used in power-off delay occasions and DC circuits.

3, the principle of electric time relay is similar to the watch, which is obtained by an internal delay deceleration motor driven gear rotated. This relay high delay precision, wide delay range (0.4 ~ 72h), but the structure is more complex, expensive.

4, transistor time relay, also known as electronic time relay, it is the use of a delay circuit for delay. This relay of high precision, small size.